Transcutaneous Electrical Acupoint Stimulation on Blood Pressure

This study will be conducted in patients with high-normal blood pressure and grade 1 hypertension and will be divided into two phases. In Phase One, a small group of patients will undergo transcutaneous electrical acupoint stimulation treatment for three consecutive days. Blood pressure changes will be observed before and after each stimulation session, as well as 1 hour, 3 hours, and 5 hours after stimulation, during the night of the treatment day, and the next morning. Phase Two will be a single-center, single-blind, parallel randomized controlled trial. After screening, patients will be randomly assigned to either the "stimulation" experimental group or the "sham stimulation" control group. For three consecutive days, both groups will receive their respective interventions at the same time each day, and their blood pressure changes will be recorded.